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EP4064459A1 - Mit klemmen ausgestatteter elektrischer draht - Google Patents

Mit klemmen ausgestatteter elektrischer draht Download PDF

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Publication number
EP4064459A1
EP4064459A1 EP22162974.4A EP22162974A EP4064459A1 EP 4064459 A1 EP4064459 A1 EP 4064459A1 EP 22162974 A EP22162974 A EP 22162974A EP 4064459 A1 EP4064459 A1 EP 4064459A1
Authority
EP
European Patent Office
Prior art keywords
core wire
electric wire
strands
terminal
wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22162974.4A
Other languages
English (en)
French (fr)
Other versions
EP4064459B1 (de
Inventor
Naoki Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yazaki Corp
Original Assignee
Yazaki Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yazaki Corp filed Critical Yazaki Corp
Publication of EP4064459A1 publication Critical patent/EP4064459A1/de
Application granted granted Critical
Publication of EP4064459B1 publication Critical patent/EP4064459B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/28—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/187—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping combined with soldering or welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/021—Soldered or welded connections between two or more cables or wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • H01R4/185—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion combined with a U-shaped insulation-receiving portion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
    • H01R4/242—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members being plates having a single slot
    • H01R4/2425—Flat plates, e.g. multi-layered flat plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
    • H01R4/2445—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives
    • H01R4/245—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the additional means having two or more slotted flat portions
    • H01R4/2452—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the additional means having two or more slotted flat portions in serial configuration, e.g. opposing folded slots
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0221—Laser welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors

Definitions

  • the present invention relates to a terminal-equipped electric wire.
  • a conventional terminal-equipped electric wire including an electric wire in which a core wire including a plurality of strands is covered with a covering, and a terminal fitting attached to the electric wire.
  • the core wire and the terminal fitting are physically and electrically connected by bringing a pair of pressure contact bodies provided in the terminal fitting into pressure contact with the core wire.
  • Japanese Utility Model Application Laid-open No. S61-112575 discloses this type of terminal-equipped electric wire.
  • the pair of pressure contact bodies are brought into pressure contact with the core wire from its outer surface side.
  • the number of strands constituting the core wire increases, the number of strands not in direct contact with the pressure contact bodies (non-contact strands) increases with respect to the number of strands in direct contact with the pressure contact bodies (contact strands).
  • the non-contact strands of the core wire are indirectly electrically connected to the pressure contact bodies via the contact strands.
  • electrical resistance between the strands of the core wire is apt to rise, resulting in an increase in electrical resistance in a connection portion between the core wire and the terminal fitting.
  • the conventional terminal-equipped electric wire has room for improvement in terms of enhancing electrical connection stability between the core wire and the terminal fitting.
  • a terminal-equipped electric wire includes an electric wire in which a core wire including a plurality of strands is covered with a covering; and a terminal fitting attached to the electric wire, wherein the terminal fitting includes a core wire connection body physically and electrically connected to the core wire, the core wire connection body has a bottom, a pair of cantilever side walls erected from the bottom and arranged facing each other with a space therebetween, and at least one set of paired pressure contact bodies arranged facing each other with a space therebetween between the pair of side walls so as to come into pressure contact with the strands in an outermost layer of the core wire by cutting the covering of the electric wire inserted from an opening between respective free ends of the pair of side walls, and the electric wire is provided with a welded portion in which all the strands of the core wire are welded together.
  • FIGS. 1 to 6 One of embodiments of the terminal-equipped electric wire according to the present invention will be described based on FIGS. 1 to 6 .
  • Reference numeral 1 in FIGS. 1 to 4 denotes a terminal-equipped electric wire of the present embodiment.
  • the terminal-equipped electric wire 1 includes an electric wire 10 and a terminal fitting 20 attached to the electric wire 10.
  • the electric wire 10 and the terminal fitting 20 are physically and electrically connected to each other.
  • the terminal-equipped electric wire 1 may be obtained by connecting the terminal fitting 20 to an end region of the electric wire 10, or by connecting the terminal fitting 20 to a portion between opposite ends of the electric wire 10.
  • the terminal-equipped electric wire 1 may also be obtained by connecting at least one terminal fitting 20 to one electric wire 10, or by connecting a plurality of electric wires 10 by at least one terminal fitting 20, and electrically connecting the electric wires 10 via the terminal fitting 20.
  • the terminal fitting 20 is formed so as to be physically and electrically connected to a mating terminal fitting by being fittingly connected to the mating terminal fitting, or so as to be physically and electrically connected to a mating electric connection portion by being screwed to the electric connection portion, the terminal fitting 20 is connected to an end region of at least one electric wire 10.
  • the terminal fitting 20 when the terminal fitting 20 is formed as a joint terminal that electrically connects a plurality of electric wires 10, the terminal fitting 20 is connected to end regions of the electric wires 10 or portions between opposite ends of the electric wires 10.
  • the terminal fitting 20 may be a joint terminal that physically and electrically connects the electric wires 10 to electrically connect all the electric wires 10 via the terminal fitting 20, or may be joint terminals, each of which physically and electrically connects at least two of the electric wires 10 as one set and is provided for each of the sets.
  • the single terminal fitting 20 to be fitted and connected to the mating terminal fitting is connected to the end region of the single electric wire 10.
  • the electric wire 10 includes a core wire 11 including a plurality of strands 11a, and a covering 12 that covers the core wire 11 ( FIGS. 1 , 3 , and 4 ).
  • the electric wire 10 described herein includes the core wire 11 obtained by bundling in a columnar shape the strands 11a made of a conductive metal wire, and the cylindrical covering 12 that concentrically covers the core wire 11 from its outer surface side.
  • the strands 11a are formed by, for instance, aluminum, aluminum alloy, copper, or copper alloy.
  • the core wire 11 may be obtained by bundling in the columnar shape the strands 11a whose axial directions are aligned with each other, or may be a twisted wire in which the strands 11a bundled in the columnar shape are twisted together. Moreover, the core wire 11 as the twisted wire may be obtained by twisting together all the strands 11a bundled in the columnar shape. The core wire 11 as the twisted wire may also be obtained by placing one strand 11a in the center and winding the remaining strands 11a around this strand 11a, or by forming a plurality of strand groups in which the strands 11a are twisted together, bundling the strand groups in a columnar shape, and twisting the strand groups together. In any form of the core wire 11 as described above, a plurality of strands 11a are arranged in an outermost layer, and a plurality of strands 11a are arranged inside the strands 11a in the outermost layer.
  • the terminal fitting 20 is formed by a conductive material such as metal.
  • the terminal fitting 20 described herein is shaped by press-forming a metal plate as a base material.
  • the terminal fitting 20 includes a terminal connection body 21 to be physically and electrically connected to a terminal connection body (not illustrated) of the mating terminal fitting, a core wire connection body 22 physically and electrically connected to the core wire 11 in the end region of the electric wire 10, and a covering connection body 23 physically connected to the covering 12 in the end region of the electric wire 10 ( FIGS. 1 to 3 ).
  • one of the terminal connection body 21 of the terminal fitting 20 and the terminal connection body of the mating terminal fitting is formed in a female terminal shape, and the other thereof is formed in a male terminal shape.
  • the terminal connection bodies are inserted and fitted to each other.
  • the terminal connection body 21 of the terminal fitting 20 is formed in a female terminal shape
  • the terminal connection body of the mating terminal fitting is formed in a male terminal shape.
  • the core wire connection body 22 has a bottom 22a and a pair of cantilever side walls 22b and 22b erected from the bottom 22a and arranged facing each other with a space therebetween ( FIGS. 1 , 2 , and 4 ).
  • the end region of the electric wire 10 is accommodated in a space surrounded by the bottom 22a and the pair of side walls 22b and 22b.
  • the pair of rectangular side walls 22b and 22b are suspended from opposite ends of the rectangular bottom 22a.
  • the end region of the electric wire 10 is inserted into the space surrounded by the bottom 22a and the pair of side walls 22b and 22b from an opening 22c between respective free ends 22b 1 and 22b 1 of the pair of side walls 22b and 22b in the core wire connection body 22 ( FIGS. 1 , 2 , and 4 ).
  • the core wire connection body 22 further includes at least one set of paired pressure contact bodies 24 and 24 arranged facing each other with a space therebetween between the pair of side walls 22b and 22b so as to come into pressure contact with the strands 11a in the outermost layer of the core wire 11 by cutting the covering 12 of the electric wire 10 inserted from the opening 22c ( FIGS. 1 to 4 ).
  • the core wire connection body 22 described herein includes two sets of the paired pressure contact bodies 24 and 24. The two sets of paired pressure contact bodies 24 and 24 are arranged with a space therebetween in an axial direction of the electric wire 10 attached to the core wire connection body 22.
  • the paired pressure contact bodies 24 and 24 may individually project from the bottom 22a toward the opening 22c. Alternatively, one of the paired pressure contact bodies 24 and 24 may project from one of the side walls 22b toward the other of the side walls 22b, and the other of the paired pressure contact bodies 24 and 24 may project from the other of the side walls 22b toward the one of the side walls 22b.
  • Each pressure contact body 24 described herein is formed as a piece body by partially bending the side wall 22b at 90 degrees.
  • the paired pressure contact bodies 24 and 24 have pressure contact ends 24a and 24a arranged facing each other with a space therebetween in a facing direction of the pair of side walls 22b and 22b such that the electric wire 10 is press-fitted therebetween ( FIG. 4 ).
  • the paired pressure contact bodies 24 and 24 are physically and electrically connected to the strands 11a in the outermost layer of the core wire 11 by sandwiching the core wire 11 between the respective pressure contact ends 24a and 24a, and applying a pressing force to the strands 11a in the outermost layer from the respective pressure contact ends 24a and 24a.
  • the space between the respective pressure contact ends 24a and 24a is made smaller than a diameter of the core wire 11.
  • Each pressure contact end 24a may be formed as a flat surface extending along an insertion direction of the electric wire 10 from the opening 22c, or as a blade-shaped pressure contact blade. Each pressure contact end 24a described herein is formed as a flat surface having a thickness equal to a plate thickness of the base material.
  • the paired pressure contact bodies 24 and 24 also have a core wire introduction portion having a larger width than the space between the respective pressure contact ends 24a and 24a, as an insertion start point in press-fitting the electric wire 10 between the respective pressure contact ends 24a and 24a, at ends closer to the opening 22c.
  • the paired pressure contact bodies 24 and 24 have inclined portions 24b and 24b individually continuous from the pressure contact ends 24a and 24a and in which a space between the inclined portions 24b and 24b increases toward the opening 22c from a border with the pressure contact ends 24a and 24a, at the ends closer to the opening 22c ( FIG. 4 ).
  • the core wire introduction portion is formed by the respective inclined portions 24b and 24b.
  • Each inclined portion 24b may be formed as a flat surface having a thickness equal to the plate thickness of the base material, or as a blade-shaped pressure contact blade.
  • Each inclined portion 24b described herein is formed as a pressure contact blade.
  • the electric wire 10 is inserted into the space surrounded by the bottom 22a and the pair of side walls 22b and 22b from the opening 22c.
  • the paired pressure contact bodies 24 and 24 thereby cut the covering 12 of the inserted electric wire 10 by the respective inclined portions 24b and 24b, exposing the strands 11a in the outermost layer of the core wire 11 in the covering 12.
  • the electric wire 10 is more deeply pushed in, so that the strands 11a in the outermost layer of the stripped core wire 11 are press-fitted between the respective pressure contact ends 24a and 24a while being rubbed against the respective pressure contact ends 24a and 24a.
  • the core wire 11 of the electric wire 10 thereby comes into a pressure contact state between the respective pressure contact ends 24a and 24a.
  • the strands 11a in the outermost layer of the core wire 11 are physically and electrically connected to the terminal fitting 20 via the respective pressure contact ends 24a and 24a.
  • the core wire connection body 22 brings the paired pressure contact bodies 24 and 24 into direct contact with the strands 11a in the outermost layer of the core wire 11 ( FIG. 4 ).
  • the core wire connection body 22 basically cannot bring the paired pressure contact bodies 24 and 24 into direct contact with the strands 11a inside the outermost layer of the core wire 11.
  • the core wire connection body 22 does not bring the paired pressure contact bodies 24 and 24 into direct contact with all the strands 11a in the outermost layer.
  • the core wire 11 is roughly divided into the strands (hereinafter referred to as "contact strands") 11a in the outermost layer, electrically connected to the pressure contact bodies 24 in direct contact therewith, and the remaining strands (hereinafter referred to as “non-contact strands”) 11a indirectly electrically connected to the pressure contact bodies 24 via the contact strands 11a.
  • contact strands strands
  • non-contact strands strands
  • the core wire 11 even when the number of strands 11a increases, not all of the increased strands 11a come into direct contact with the pressure contact bodies 24.
  • an increasing rate of the non-contact strands 11a becomes higher than an increasing rate of the contact strands 11a, resulting in an increase in electrical resistance between the strands of the core wire 11.
  • the terminal-equipped electric wire 1 electrical connection stability between the core wire 11 and the terminal fitting 20 is enhanced by reducing the electrical resistance between the strands of the core wire 11.
  • the electrical resistance between the strands of the core wire 11 is reduced by physically and electrically connecting all the strands of the core wire 11.
  • the electric wire 10 is provided with a welded portion 11b in which all the strands of the core wire 11 are welded together ( FIGS. 1 to 3 and 5 ).
  • the terminal-equipped electric wire 1 of the present embodiment can prevent an increase in electrical resistance in a connection portion between the core wire 11 and the core wire connection body 22.
  • the electric wire 10 when the strands 11a are formed by aluminum or aluminum alloy, an oxide film is formed on the surfaces of the strands 11a.
  • the welded portion 11b is formed in the core wire 11, all the strands are welded together with the oxide films removed therefrom.
  • the increase in the electrical resistance between the strands can be prevented even when the strands 11a of the core wire 11 are formed by aluminum or aluminum alloy.
  • the paired pressure contact bodies 24 and 24 scrape off the oxide films of the strands 11a in the outermost layer of the core wire 11 while rubbing against the surfaces of the strands 11a by the respective pressure contact ends 24a and 24a.
  • the core wire connection body 22 can bring the paired pressure contact bodies 24 and 24 into contact with the strands 11a in the outermost layer of the core wire 11 with no oxide film therebetween. Consequently, the terminal-equipped electric wire 1 of the present embodiment can prevent the increase in the electrical resistance in the connection portion between the core wire 11 and the core wire connection body 22 even when the strands 11a are formed by aluminum or aluminum alloy.
  • the welded portion 11b may be provided in the end region of the electric wire 10, or between the opposite ends of the electric wire 10.
  • the welded portion 11b may also be formed in the core wire 11 covered with the covering 12, or may be formed in the core wire 11 before covered with the covering 12.
  • the welded portion 11b is provided in an exposed portion of the core wire 11 at an end 10a in the end region of the electric wire 10.
  • the welded portion 11b is formed in the exposed portion of the core wire 11 with the core wire 11 covered with the covering 12.
  • the welded portion 11b is formed in the core wire 11 before covered with the covering 12.
  • the welded portion 11b is formed by, for instance, irradiating a portion of all the strands 11a bundled in the core wire 11 with laser light, and welding all the strands of the core wire 11 together by the laser irradiation.
  • the welded portion 11b described herein is provided in the exposed portion of the core wire 11 at the end 10a of the electric wire 10 ( FIG. 5 ).
  • the core wire 11 described herein is covered with the covering 12 to an axial end surface 10b at the end 10a of the electric wire 10.
  • the core wire 11 has an exposed surface 11c exposed along the end surface 10b at the end 10a of the electric wire 10 (the upper and middle drawings of FIG. 5 ).
  • the welded portion 11b described herein is formed by irradiating the exposed surface 11c of the core wire 11 with laser light, and welding all the strands together by the laser irradiation of the exposed surface 11c of the core wire 11 (the middle and lower drawings of FIG. 5 ).
  • the welded portion 11b is a laser welded portion formed by the laser irradiation of the exposed surface 11c of the core wire 11.
  • the laser irradiation may be performed on the single electric wire 10 disposed in a jig, or performed sequentially on a plurality of the electric wires 10 arranged on a jig.
  • the covering connection body 23 has a bottom 23a and a pair of barrel pieces 23b and 23b projecting from opposite ends of the bottom 23a ( FIGS. 1 and 2 ).
  • the end region of the electric wire 10 is inserted from an opening 23c ( FIG. 1 ) between respective free ends 23b 1 and 23b 1 of the barrel pieces 23b and 23b in the covering connection body 23.
  • the covering 12 is placed on an inner wall surface (bottom surface) of the bottom 23a.
  • the covering connection body 23 is wound around the covering 12 in the end region of the electric wire 10 while, for example, pressurizing and deforming the respective barrel pieces 23b and 23b.
  • the terminal-equipped electric wire 1 of the present embodiment can prevent the increase in the electrical resistance in the connection portion between the core wire 11 and the core wire connection body 22. Consequently, the electrical connection stability between the core wire 11 and the terminal fitting 20 can be enhanced.
  • the exposed surface 11c along the end surface 10b at the end 10a is irradiated with laser light without partially stripping the covering 12 in forming the welded portion 11b.
  • the terminal-equipped electric wire 1 does not require the operation of stripping the covering 12, thereby preventing an increase in operation process.
  • the core wire 11 is exposed in a columnar shape at the end 10a by stripping the covering 12 at the end 10a in some cases (the upper and middle drawings of FIG. 6 ).
  • the terminal-equipped electric wire 1 of the present embodiment can be also applied to the electric wire 10 having such a columnar exposed portion of the core wire 11.
  • the electric wire 10 is disposed in a jig before attached to the terminal fitting 20, and all the strands are welded together by irradiating the columnar exposed portion of the core wire 11 with laser light from its outer peripheral side (the middle and lower drawings of FIG. 6 ).
  • the terminal fitting 20 may be used as a jig after the electric wire 10 is attached to the terminal fitting 20, and all the strands may be welded together by irradiating the columnar exposed portion of the core wire 11 with laser light from its outer peripheral side.
  • the electric wires 10 may be connected to at least one set of the paired pressure contact bodies 24 and 24 by increasing the lengths of the respective pressure contact ends 24a and 24a of the paired pressure contact bodies 24 and 24 according to the number of electric wires 10 as a connection target. Additionally, when the terminal fitting according to the present invention connects the electric wires 10, at least one set of the paired pressure contact bodies 24 and 24 may be provided for each of the electric wires 10.
  • the terminal-equipped electric wire according to the present embodiment can prevent the increase in the electrical resistance in the connection portion between the core wire and the core wire connection body, enhancing the electrical connection stability between the core wire and the terminal fitting.
  • the oxide film is formed on the surfaces of the strands.
  • the welded portion is formed in the core wire, however, all the strands are welded together with the oxide films removed therefrom.
  • the increase in the electrical resistance between the strands can be prevented even when the strands of the core wire are formed by aluminum or aluminum alloy.
  • the paired pressure contact bodies scrape off the oxide films of the strands in the outermost layer of the core wire while rubbing against the surfaces of the strands.
  • the core wire connection body can bring the paired pressure contact bodies into contact with the strands in the outermost layer of the core wire with no oxide film therebetween. Consequently, the terminal-equipped electric wire according to the present embodiment can prevent the increase in the electrical resistance in the connection portion between the core wire and the core wire connection body even when the strands are formed by aluminum or aluminum alloy.
  • the terminal-equipped electric wire according to the present embodiment can prevent the increase in the electrical resistance in the connection portion between the core wire and the core wire connection body, thereby enhancing the electrical connection stability between the core wire and the terminal fitting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
EP22162974.4A 2021-03-23 2022-03-18 Mit klemmen ausgestatteter elektrischer draht Active EP4064459B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2021048008A JP7408592B2 (ja) 2021-03-23 2021-03-23 端子付き電線

Publications (2)

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EP4064459A1 true EP4064459A1 (de) 2022-09-28
EP4064459B1 EP4064459B1 (de) 2023-08-23

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US (1) US11749912B2 (de)
EP (1) EP4064459B1 (de)
JP (1) JP7408592B2 (de)
CN (1) CN115117647A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7783558B2 (ja) * 2022-05-24 2025-12-10 株式会社オートネットワーク技術研究所 コネクタ

Citations (8)

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US4385794A (en) * 1978-07-25 1983-05-31 Amp Incorporated Insulation displacement terminal
JPS60136107A (ja) * 1983-12-23 1985-07-19 住友電装株式会社 電気機器用ハ−ネス
US4593963A (en) * 1983-10-26 1986-06-10 Yazaki Corporation Wire-harness for automobiles
JPS61112575U (de) 1984-12-26 1986-07-16
JPH08115756A (ja) * 1994-10-14 1996-05-07 Yazaki Corp 電線の接続構造および接続方法
DE19717317A1 (de) * 1997-04-24 1998-10-29 Heidenhain Gmbh Dr Johannes Verfahren zum Verhindern des Aufspleissens von Litzen
US20150060135A1 (en) * 2013-09-04 2015-03-05 Delphi Technologies, Inc. Method of attaching a wire cable terminal to a multi-strand wire cable, wire cable formed during said method, and apparatus for forming said wire cable
WO2020110526A1 (ja) * 2018-11-30 2020-06-04 オムロン株式会社 センサ

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US3601783A (en) * 1969-03-05 1971-08-24 Amp Inc Electrical connector with spring biased solder interface
US4926548A (en) * 1984-10-17 1990-05-22 Amp Incorporated Select solder slot termination method
JPH01225084A (ja) * 1988-03-04 1989-09-07 Nippon Koneshisu Kk 端子のレーザー加工方法
JPH06260218A (ja) * 1993-03-04 1994-09-16 Sumitomo Wiring Syst Ltd 電線接合方法
JP3315870B2 (ja) * 1996-08-08 2002-08-19 矢崎総業株式会社 圧接端子
JP3311617B2 (ja) 1996-12-17 2002-08-05 矢崎総業株式会社 電線と端子との接続構造及び接続方法
JP3954997B2 (ja) * 2003-08-08 2007-08-08 矢崎総業株式会社 圧接用接続端子及びそれを収容した圧接コネクタ
JP5654242B2 (ja) * 2010-01-18 2015-01-14 矢崎総業株式会社 電線の端末処理方法
JP5684583B2 (ja) * 2010-11-26 2015-03-11 矢崎総業株式会社 電線と端子の接続構造およびその製造方法
JP6373077B2 (ja) * 2014-06-12 2018-08-15 古河電気工業株式会社 圧着端子付き電線
JP6974135B2 (ja) * 2017-11-24 2021-12-01 矢崎総業株式会社 端子接続方法
JP2019212458A (ja) * 2018-06-04 2019-12-12 矢崎総業株式会社 端子付き電線および端子付き電線の製造方法

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Publication number Priority date Publication date Assignee Title
US4385794A (en) * 1978-07-25 1983-05-31 Amp Incorporated Insulation displacement terminal
US4385794B1 (de) * 1978-07-25 1987-11-10
US4593963A (en) * 1983-10-26 1986-06-10 Yazaki Corporation Wire-harness for automobiles
JPS60136107A (ja) * 1983-12-23 1985-07-19 住友電装株式会社 電気機器用ハ−ネス
JPS61112575U (de) 1984-12-26 1986-07-16
JPH08115756A (ja) * 1994-10-14 1996-05-07 Yazaki Corp 電線の接続構造および接続方法
DE19717317A1 (de) * 1997-04-24 1998-10-29 Heidenhain Gmbh Dr Johannes Verfahren zum Verhindern des Aufspleissens von Litzen
US20150060135A1 (en) * 2013-09-04 2015-03-05 Delphi Technologies, Inc. Method of attaching a wire cable terminal to a multi-strand wire cable, wire cable formed during said method, and apparatus for forming said wire cable
WO2020110526A1 (ja) * 2018-11-30 2020-06-04 オムロン株式会社 センサ

Also Published As

Publication number Publication date
US20220311154A1 (en) 2022-09-29
EP4064459B1 (de) 2023-08-23
US11749912B2 (en) 2023-09-05
JP2022146961A (ja) 2022-10-06
CN115117647A (zh) 2022-09-27
JP7408592B2 (ja) 2024-01-05

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